Ammonium Phosphate/Fly Ash Road Base Construction, HR-294, 1993

(1993) Ammonium Phosphate/Fly Ash Road Base Construction, HR-294, 1993. Transportation, Department of


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The objective of this research project was to evaluate the construction and service performance of ammonium phosphate/fly ash (APFA) treated base courses of crushed fines and/or unprocessed sand. Specific test results related to construction of the test sections were included in the 1987 construction report by Iowa State University. The performance of the experimental sections is dealt with in this final report. This 1986 project demonstrated that in all cases the control sections utilizing a Type B base experienced dramatically less cracking in the surface than the APFA treated base sections. The cost per mix and subsequent surface maintenance costs for the APFA base sections, especially those having a substantial amount of limestone, were higher than the Type B base control sections. This type of construction may prove to be economical only when petroleum product costs escalate.

Item Type: Departmental Report
Keywords: Ammonium compounds, Base course (Pavements), Costs, Crushed aggregates, Fly ash, Maintenance management, Pavement cracking, Performance evaluations, Phosphates, Sand, Test sections, Maintenance costs
Subjects: Transportation > Pavements
Transportation > Roads and highways
Transportation > Design and Construction
ID Code: 16480
Deposited By: Iowa DOT Library
Deposited On: 24 Mar 2014 11:53
Last Modified: 05 Nov 2014 15:57